Apparatus for shaking out castings



Nov. 22,1949- G. w. BEHNKE ET AL APPARATUS FOR SHAKING OUT CASTINGS 2 Sheets-Sheet 1 Filed Nov. 8, 1945 I I I l I I III Nov. 22, 1949 3 w, BEHNKE ET AL 2,489,074

' APPARATUS FOR SHAKING OUT CASTINGS Filed Nov. 8, 1945 2 Sheets-Sheet 2 Patented Nov. 22, 1949 UNITED STATES TENT OFFICE APPARATUS-FOR SHAKING OUT CASTINGS Application November 8, 1945, Serial N0. 62'7,391

1 Claim. .1.

This invention relates-to ashake-out apparatus such as used for shaking out castings and crushing and screening used foundry sand or other granular materials from the molds.

One of :the prime:objects-of-,the .invention is to design an apparatus that shakes out sand, castings, etc. from the molds, which breaks up and crushes burntsand lumps, and screens the sand for further-use.

Another object isto provide a crushing plate in combination with the screen for crushing 'crushable lumps -of all kinds while permitting passage of the-castings being screened.

A furtherobject is to-provide hingedly mounted crushing means includingpoweractuated means for swinging the lowerend'ofthe crusherplate upwardly to release accumulated castings or for any other desired reason.

A further object still is to design a hingedly hung crusher plate and provide resilient means associated therewith to cushion the movements of the plate to relieve wear, and insure more effective operation of the mechanism.

With the above and other objects in view, the

present invention consists in the combination and arrangement of parts, hereinafter more fully described, illustrated in the accompanying drawing, and more particularly pointed out in the appended claim, it being understood that changes may be made in the form, size, proportion, and

minor details of construction, without departing from the spirit, or sacrificing any of the advantages of the invention.

In the drawings:

Fig. 1 is a part-sectional, side-elevational view of a gyratory shake-out apparatus with the crushing mechanism in position, the screen being shown in two sections.

Fig. 2 is a front-elevational view.

Fig. 3 is a fragmentary, side-elevational view showing the screen and crushing mechanism, the broken lines showing the plate raised, the arrows showing the direction of flow of the material, the screen being shown in one continuous strip.

Referring now more particularly to the drawings in which we have shown the preferred embodiment of our invention, the numerals H) and II indicate the beams of the main frame, these beams are suitably inclined as shown, and a gyratory shaft assembly G spans said main frame and is journaled in bearings [2 provided thereon, this assembly being driven by means of a motor M as usual.

A gyratory screen frame S is carried on the shaft assembly G and comprises spaced-apart side plates l4 and: l=5--respectively, and a screen I6 is mounted on and spans the side plates, said screen being of proper mesh to suit the material to be screened. TI

The'screen'framejsis of the balancedtype, the gyratory shaft assembly .63 being located intermediate the length of the screen, and resilient corner members I! connect the main frame and the screen frame in the conventional manner.

The screen frame can. be vibrated or gyrated in any desired manner, one-example being shown and described in Behnke Patent No. 2,020,131, granted November .5, 1935.

The crusher mechanism is suspended. at. the lower or discharge endof the screen .frame, and is supported on a fabricatedframe 'F'which is in turn mounted on the main frame, said fabricated frame comprising spaced-apart uprights i8, suitably reinforced, With the upper ends connected by means of transversely disposed members 59, and from which the crusher plate is hung.

The crusher plate 28 is relatively heavy, the upper end being hung from a transversely disposed beam assembly 2l that spans the frame F. Spaced-apart sheave members 22 and 23 respectively are mounted on the upper edge of the crusher plate, and a cable 24 leads under said sheaves, thence the cable ends lead upwardly at an angle, extending through housings 25 provided on the beam 2|, thence through springs 25 that are interposed between the members 21 and 28 respectively, and clamps 29 are clamped to the cable above the members 28 to form an anchor thereat, both ends are secured in exactly the same manner so that the plate is loosely and resiliently suspended.

The upper end of the plate 20 is anchored to a beam 30 that spans the frame F to limit swinging action thereof, and lugs 3| are provided on the upper end of the crusher plate, a cable 32 being anchored to these lugs, said cable leading upwardly and through a guide 33 provided on the beam 39, thence leading through the spring 34, which is interposed between the members 35 and 36, and a clamp 3'! is secured to the cable as shown to provide an anchor as previously described.

The lower end of the crusher plate 20 is spaced a limited predetermined distance above the face of the screen, and is supported in substantially the same manner as the upper end, spaced-apart pairs of upstanding lugs 38 being provided on the lower edge of the plate, and cables 39 are connected to the respective pairs of lugs, the upper 3 ends of the cables being anchored to the assemblies H in exactly the same manner, and it is not deemed necessary to further describe this assembly.

The raisin and/or lowering of the lower end of the crusher plate is hydraulically controlled, a cylinder 40 being mounted on the frame F, and is provided with a piston (not shown) as usual, a rod 4| being connected to the piston and to the cable 42, the opposite end of the cable being anchored to lugs 43 provided on the plate.

An air supply line 44 is connected to any suitable source of air supply, and a conventional valve V is interposed in said line, a branch line 45 being connected to the lower end of the cylinder 40, and an exhaust line 46 is connected to the upper end of the cylinder, a Valve control handle 41 being provided as shown so that the flow of air to the cylinder can be controlled, and the lower end of the crusher plate raised and/or lowered as desired.

A plurality of teeth 48 are provided on the lower face of the plate in staggered relation, these teeth serving to crush burnt lumps of sand or other crushable material, and should core parts or .other uncrushable matter accumulate at the lower toothed end of the plate, the operator merely actuates the valve to momentarily swing the plate upwardly to release the accumulation, after which it is again lowered to working position.

The raising and/or lowering is entirely mechanical, requiring no heavy manual labor, and the operation can be quickly accomplished.

From the foregoing description, it will be understood that we have perfected a simple, practical, and effective apparatus for shaking out castings and crushing and screening the used sand.

What we claim is:

In combination, a vibrating screen mechanism including a main frame having a vertically disposed super-structure extending upwardly from said main frame, a screen, an inclined crusher plate above said screen, flexible suspension cables for securing said plate to said super-structure and to permit undirectional movement thereof, and hydraulic means on the super-structure including a pressure-actuated piston with a cable connected thereto and to the lower plate for vertically adjusting the lower end of said crusher plate.

GEORGE W. BEHNKE. RUSSELL G. WESTCOTT. JOHN SANDULA.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 340,999 Graves May 4, 1886 395,957 Derbec Jan. 8, 1889 668,651 Lingo Feb. 26, 1901 1,860,480 Boyer May 31, 1932 2,020,800 Royer Nov. 12, 1935 2,107,532 Hallenbeck Feb. 8, 1938 2,170,569 Montgomery Aug. 22, 1939 2,176,552 Vocaturo Oct. 17, 1939 2,187,273 Larson Jan. 16, 1940 

